The Curb builder pack contains 4 different textured sets of curb / sidewalk kitbash element kits. 

The building blocks allow for plain / no as well as rail, or chained perimeter

4 surfaces are:

1. Asphalt

2 Dark Asphalt

3. Large tile

4. Small tile or cobble

Snap scenes together very quickly, allowing you to spend the time on the actual environment, and not the menial details.